{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-23115",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-23115",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-02-14T15:09:47.826Z",
    "updatedAt": "2026-05-11T22:00:24.910Z",
    "importedAt": "2026-10-24T01:58:02.025Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "serial: Fix not set tty->port race condition",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nserial: Fix not set tty->port race condition\n\nRevert commit bfc467db60b7 (\"serial: remove redundant\ntty_port_link_device()\") because the tty_port_link_device() is not\nredundant: the tty->port has to be confured before we call\nuart_configure_port(), otherwise user-space can open console without TTY\nlinked to the driver.\n\nThis tty_port_link_device() was added explicitly to avoid this exact\nissue in commit fb2b90014d78 (\"tty: link tty and port before configuring\nit as console\"), so offending commit basically reverted the fix saying\nit is redundant without addressing the actual race condition presented\nthere.\n\nReproducible always as tty->port warning on Qualcomm SoC with most of\ndevices disabled, so with very fast boot, and one serial device being\nthe console:\n\n  printk: legacy console [ttyMSM0] enabled\n  printk: legacy console [ttyMSM0] enabled\n  printk: legacy bootconsole [qcom_geni0] disabled\n  printk: legacy bootconsole [qcom_geni0] disabled\n  ------------[ cut here ]------------\n  tty_init_dev: ttyMSM driver does not set tty->port. This would crash the kernel. Fix the driver!\n  WARNING: drivers/tty/tty_io.c:1414 at tty_init_dev.part.0+0x228/0x25c, CPU#2: systemd/1\n  Modules linked in: socinfo tcsrcc_eliza gcc_eliza sm3_ce fuse ipv6\n  CPU: 2 UID: 0 PID: 1 Comm: systemd Tainted: G S                  6.19.0-rc4-next-20260108-00024-g2202f4d30aa8 #73 PREEMPT\n  Tainted: [S]=CPU_OUT_OF_SPEC\n  Hardware name: Qualcomm Technologies, Inc. Eliza (DT)\n  ...\n  tty_init_dev.part.0 (drivers/tty/tty_io.c:1414 (discriminator 11)) (P)\n  tty_open (arch/arm64/include/asm/atomic_ll_sc.h:95 (discriminator 3) drivers/tty/tty_io.c:2073 (discriminator 3) drivers/tty/tty_io.c:2120 (discriminator 3))\n  chrdev_open (fs/char_dev.c:411)\n  do_dentry_open (fs/open.c:962)\n  vfs_open (fs/open.c:1094)\n  do_open (fs/namei.c:4634)\n  path_openat (fs/namei.c:4793)\n  do_filp_open (fs/namei.c:4820)\n  do_sys_openat2 (fs/open.c:1391 (discriminator 3))\n  ...\n  Starting Network Name Resolution...\n\nApparently the flow with this small Yocto-based ramdisk user-space is:\n\ndriver (qcom_geni_serial.c):                  user-space:\n============================                  ===========\nqcom_geni_serial_probe()\n uart_add_one_port()\n  serial_core_register_port()\n   serial_core_add_one_port()\n    uart_configure_port()\n     register_console()\n    |\n    |                                         open console\n    |                                          ...\n    |                                          tty_init_dev()\n    |                                           driver->ports[idx] is NULL\n    |\n    tty_port_register_device_attr_serdev()\n     tty_port_link_device() <- set driver->ports[idx]",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "bfc467db60b76c30ca1f7f02088a219b6d5b6e8c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2501c49306238b54a2de0f93de43d50ab6e76c84"
            },
            {
              "version": "bfc467db60b76c30ca1f7f02088a219b6d5b6e8c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "32f37e57583f869140cff445feedeea8a5fea986"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.15",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.15"
            },
            {
              "version": "6.18.8",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "6.19",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}